In A House Of Lies (Rebus #22) Ian Rankin

Private investigator Stuart Bloom was missing, presumed dead.

Until now. His body is discovered in an abandoned car - in an area that had already been searched... Detective Inspector Siobhan Clarke combs through the mistakes of the original investigation.

After a decade without answers, it's time for the truth. But it seems everyone involved with the case is hiding something. None more so than Siobhan's own mentor: former detective John Rebus.

The only man who knows where the trail may lead - and that it could be the end of him.